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ALEX · Executive Summary

2708 Springwood Lane, Georgetown

Comparable-sales valuation · Listed Property Buyer Model · Williamson County

Prepared for Elizabeth HeringPrepared by Diane Hart Alexander, MBA, MHA, Designated BrokerSummary revised October 12, 2026, 9:26 PM CDTReport version 14.332

Recommended initial offer

$645,500

It combines the ALEX AI Valuation Model with how similar listings negotiated: the low end of the ALEX AI Valuation Model's measured error band.

What are you thinking? If this offer doesn’t feel right to you, talk it over with Diane Hart Alexander.

01What the evidence says this house is worth

What the two Models share. Both models start from the same sales. But at that point they dramatically differ.

ALEX AI Statistical Model

Minimum

$682,714

Average

$702,014

Median

$682,714

Maximum

$721,313

ALEX’s statistical model uses two comparable sales. Each sale’s adjusted price is carried to this home’s 2,990 SF using the size effect measured from 15,182 recent sales in the ABOR market: resales priced $600,000 to $1,000,000, closed since July 2023. Each sale is then weighted by how closely it matches this home on size, age, lot, rooms, distance and date of sale. The average and median are weighted; the minimum and maximum are the lowest and highest single sale.

Traditional Arithmetic Model

Minimum

$715,067

Average

$735,696

Median

$735,696

Maximum

$756,324

The same two sales, with no adjustments: the average sale price per SF times this home’s 2,990 SF, every sale counted equally. Section 02 explains how the two Models differ.

02How the two Models differ

Arithmetic Model. The math is simple:

  1. Sale Price per SF for Each Home. For each home used as a comparable sale, divide its sale price by its total SF.
  2. Average Sale Price per SF. Add the Sale Price per SF for Each Home, then divide by the number of homes.
  3. Your Home’s SF. Use the SF on the MLS listing, the same source as every comparable sale.
  4. Your Home’s Estimated Value. Average Sale Price per SF multiplied by Your Home’s SF.

Example. $200 (Average Sale Price per SF) × 2,500 SF (Your Home’s SF) = $500,000 (Your Home’s Estimated Value).

ALEX Model. It is completely logical, statistically accurate and defensible at an MIT PhD Dissertation Committee Review. But it requires an NVIDIA mini, or something equivalent, to do the math. The detailed report sets out the full method.

How one sale becomes a value: 3006 Hawthorne Cv

Sale price
$750,000
What it sold for
Net sale price
$750,000
+$0
Less the buyer's closing costs and repairs the seller paid
Brought to today
$735,248
−$14,752
The market's change since it sold
Adjusted to this home
$680,553
−$54,695
ALEX and Diane adjustments for every difference
At this home's size
$686,291
+$5,738
Its adjusted price per SF times this home's 2,990 SF
Size correction
$682,714
−$3,577
Larger homes sell for less per SF, measured on the market

This sale says this home is worth $682,714 and carries 50.0% of the weight, the most of the 2 sales, because it is the closest match. Every sale goes through the same steps. The weighted average of all 2 is $702,014. That is ALEX’s valuation.

How much each sale counts

3006 Hawthorne Cv: 50.0% 2600 Grapevine Springs Cv: 50.0% 2 SALES
3006 Hawthorne Cv $682,71450.0%
2600 Grapevine Springs Cv $721,31350.0%
Weighted average$702,014100%

Each slice is one sale’s share of the valuation. The closer a sale is to this home on the six measures of similarity, the bigger its slice. The dollar figure is what that sale says this home is worth. Each one is multiplied by its share, and the results add up to the weighted average.

Compared on the average alone, ALEX’s valuation is lower than the traditional arithmetic figure. The difference is shown below in dollars and as a percentage of the traditional average.

ALEX AI average

$702,014

Traditional average

$735,696

Difference

ALEX’s valuation is $33,682 lower · 4.6% lower

03How the comparable sales are chosen

04Appendix: summary of comparable properties

All two are in Falls Of San Gabriel, this house’s own subdivision. In each table the first column is this house and each column after it is one comparable sale. Dollar amounts are rounded to the nearest dollar, and each total is the sum of the lines shown above it.

The house

Front of 2708 Springwood Ln2708 Springwood LnThis houseMLS # 4222044Front of 3006 Hawthorne Cv3006 Hawthorne CvSale 1MLS # 3935997Front of 2600 Grapevine Springs Cv2600 Grapevine Springs CvSale 2MLS # 8742726
Distance from this house—0.11 mi ESE0.14 mi SSW
Living area2,990 SF2,965 SF2,927 SF
Bedrooms443
Bathrooms332.1
Year built200420042008
Lot area20,190 SF35,227 SF22,473 SF
Garage3-car3-car1-car
LevelsOneOneTwo

The sale

Front of 2708 Springwood Ln2708 Springwood LnThis houseMLS # 4222044Front of 3006 Hawthorne Cv3006 Hawthorne CvSale 1MLS # 3935997Front of 2600 Grapevine Springs Cv2600 Grapevine Springs CvSale 2MLS # 8742726
Listing date10/10/2604/08/2605/09/25
Close dateActive05/08/2601/29/26
Days on market29178
Original list price$675,000$750,000$834,500
Last list price$675,000$750,000$735,000
Closed price—$750,000$700,000
Buyer closing costs paid by the seller———
Repairs at the buyer’s request———
Net sale price—$750,000$700,000

Time adjustment

Months from sale to today—5 months9 months
Market trend to today—−$14,752−$3,912
Time-adjusted net sale price—$735,248$696,088
Per SF—$248$238

AI & Diane Adjustments

Front of 2708 Springwood Ln2708 Springwood LnThis houseMLS # 4222044Front of 3006 Hawthorne Cv3006 Hawthorne CvSale 1MLS # 3935997Front of 2600 Grapevine Springs Cv2600 Grapevine Springs CvSale 2MLS # 8742726
Age——−$6,010
Lot size—−$30,208−$5,798
Stories——+$18,207
Bedroom count———
Full bath——+$19,421
Primary bath———
Full bath 2———
Full bath 3———
Half bath——−$8,660
Garage——+$26,094
Kitchen———
Interior quality———
Interior lighting———
Pool———
View—−$8,435−$20,534
Fireplace——−$8,524
Study office—−$8,050—
Patio—+$4,736—
Deck———
Outdoor kitchen———
Outbuilding———
Solar———
Exterior condition———
Front yard———
Back yard———
Updated or remodeled———
Cul-de-sac———
Corner lot——+$5,251
Guest suite—−$4,734—
Fence—−$8,004—
Foundation———
Septic———
Well———
Flood plain———
Casita———
Visible disrepair———
Bathrooms———
Total AI & Diane adjustments—−$54,695+$19,447

Size adjustment

Front of 2708 Springwood Ln2708 Springwood LnThis houseMLS # 4222044Front of 3006 Hawthorne Cv3006 Hawthorne CvSale 1MLS # 3935997Front of 2600 Grapevine Springs Cv2600 Grapevine Springs CvSale 2MLS # 8742726
Scaling to 2,990 SF—+$5,738+$15,401
Statistical size adjustment—−$3,577−$9,623
Total size adjustment—+$2,161+$5,778

Scaling to 2,990 SF. Every home that sold is smaller than this one. To compare them fairly, each sale’s price is first restated at this home’s size, using the sale’s own price per SF. For example, 3006 Hawthorne Cv has 2,965 SF. Its price after the time adjustment and all feature adjustments, including any made by Diane, is $680,553. Restated at this home’s size: $680,553 × 2,990 ÷ 2,965 = $686,291. The scaling line for 3006 Hawthorne Cv is the difference, +$5,738.

Statistical size adjustment. Scaling at a sale’s own price per SF assumes that price per SF stays the same as size changes. It does not. Smaller homes usually sell for more per SF than larger ones. Every home has a kitchen, bathrooms and a lot, and those cost about the same whatever its size. Scaling alone therefore overstates the value of a sale smaller than this home and understates the value of a larger one. Two sales are too few to measure reliably how price per SF changes with size, so ALEX measured it from 15,182 sales in the ABOR market: resales priced $600,000 to $1,000,000, closed since July 2023, holding age, lot, rooms and date of sale constant, and applies that correction to each sale. For 3006 Hawthorne Cv the statistical size adjustment is −$3,577, so its total size adjustment is +$2,161. The further a sale’s size is from this home’s, the larger the correction.

Final valuation

Front of 2708 Springwood Ln2708 Springwood LnThis houseMLS # 4222044Front of 3006 Hawthorne Cv3006 Hawthorne CvSale 1MLS # 3935997Front of 2600 Grapevine Springs Cv2600 Grapevine Springs CvSale 2MLS # 8742726
Weight in the statistical model—50.0%50.0%
Net sale price—$750,000$700,000
Time adjustment—−$14,752−$3,912
AI & Diane adjustments—−$54,695+$19,447
Size adjustment—+$2,161+$5,778
Final adjusted value—$682,714$721,313
Final adjusted sale price per SF—$228$241